JP2019007931A - Air hole plug of water sampler and water sampler - Google Patents

Abstract

To provide an air hole plug of a water sampler, which prevents a slip of fingers of an operator during loosening, and which suppresses a variation in fastening torque by the operator during fastening.SOLUTION: An air hole plug 7 of a water sampler 1 allows the inside and outside of the hollow water sampler 1 to communicate with each other, and closes an air hole 25 which is opened during discharging water from the inside of the water sampler 1 by screwing. The air hole plug 7 includes: a male screw 27 screwed into a female screw 25a of the air hole 25; and a knob part 29 which has a pillar shape integrated with the male screw 27, and which is rotationally operated during screw-on operation and screw-off operation. The knob part 29 includes an engagement part 37 for allowing fingers of an operator to perform engagement in a rotational direction during the rotational operation on a front face 29b.SELECTED DRAWING: Figure 6

Description

  The present invention relates to an air hole plug and a water sampler of a water sampler that collects water by being submerged in water such as the sea.

  In ocean observation and the like, a water sampler may be mounted on an ocean observation device called CTD (Conductivity Temperature & Depth Profiling System).

  The CTD is for observing seawater near the seabed while measuring the distance from the sea surface to the seabed when submerged. At that time, the water sampler collects seawater. As such a water sampler, there exists a thing of patent document 1, for example.

  The water sampler of patent document 1 makes it possible to open and close the upper and lower openings of a cylindrical water sample container as a body part of the water sampler by a lid, and in the water such as the sea with the upper and lower openings of the water sample container opened Sampling is performed by closing the opening of the sampling container with the lid.

  In the water sampling device, an air hole closed by an air hole plug is provided at an upper end portion of the water sampling container, and a drainage valve is provided at a lower end portion of the water sampling container. And in a water sampling device, after draining an air hole plug and making the inside and outside of an air hole communicate, it can drain from a drain valve.

  The air hole plug has a male screw part screwed into a female screw part on the inner periphery of the air hole, and a cylindrical knob part integrated with the male screw part, and an operator pinches the outer periphery of the knob part with a finger and turns it. To tighten or loosen against the air holes.

  However, when loosening the air hole plug, the knob part is rotated to be drained by being lifted from the water, so if the operator pinches the outer periphery of the wet knob part with a finger and turns it, the knob part becomes small and cylindrical. For this reason, there was a problem that the finger slipped and the work became difficult.

  When tightening the air hole plug, the male screw part of the air hole plug is screwed into the female thread part of the air hole while a seal member such as an O-ring is sandwiched between the knob part of the air hole plug and the water sampling container. However, the torque at the time of screwing, that is, the tightening torque varies depending on the operator, and there is a problem that the seal member is damaged or the air hole is not sufficiently closed.

Japanese Patent No. 3181598

  The problem to be solved is that the operator's fingers are slippery and difficult to work when loosening, and the tightening torque varies depending on the operator when tightening.

  In the present invention, the operator's finger is difficult to slip when loosened, and in order to suppress variation in tightening torque by the operator when tightening, the inside and outside of the hollow water sampler are communicated with each other from the inside of the water sampler. An air hole plug of a water sampler for closing an air hole that is opened during drainage by screwing, wherein the male screw part for screwing and a columnar shape integral with the male screw part are screwing operations of the male screw part And a knob portion that is rotated at the time of screwing and unscrewing operation, and the knob portion has an engaging portion that engages an outer peripheral surface or a surface with a finger in the rotation direction during the rotation operation. And

  Since the air hole plug of the present invention can engage the finger in the rotation direction with the outer peripheral surface of the knob part or the engaging part of the surface, the operator's finger is difficult to slip when loosened, and the work can be easily and reliably performed. Can be done.

  Moreover, the air hole plug of the present invention serves as a standard of torque when the engaging portion is tightened, and can suppress variation in tightening torque by the operator.

(Example 1) which is a perspective view which shows the water sampling device which has an air hole stopper. (Example 1) which is a perspective view which shows the air hole plug periphery of FIG. (Example 1) which is a perspective view of the air hole plug of FIG. (Example 1) which is a front view of the air hole plug of FIG. (Example 1) which is a side view of the air hole plug of FIG. (Example 1) which is a top view of the air hole plug of FIG. (Example 1) which is a rear view of the air hole plug of FIG. (Example 1) which is a front view which shows the air hole plug which concerns on a modification. (Example 2) which is a front view of an air hole plug. FIG. 10 is a plan view of the air hole plug of FIG. 9 (Example 2). (Example 3) which is a front view of an air hole plug. FIG. 12 is a plan view of the air hole plug of FIG. 11 (Example 3). It is a front view which shows the air hole plug which concerns on a modification (Example 3). (Example 4) which is a front view of an air hole plug. (Example 4) which is a top view of the air hole plug of FIG. (Example 5) which is a front view of an air hole plug. (Example 5) which is a top view of the air hole plug of FIG. It is a principal part front view of a water sampler (Example 6).

  An engaging part for engaging the finger in the rotation direction with the knob part of the air hole plug is provided for the purpose of preventing the operator's finger from slipping when loosening and suppressing variation in tightening torque by the operator when tightening. Realized by.

  Specifically, it is an air hole plug of a water sampler that connects the inside and outside of a hollow water sampler and closes an air hole that is opened when draining from the water sampler by screwing. And a knob part that is integrally formed with the male screw part and is rotated when the male screw part is screwed and unscrewed. The knob portion has an engaging portion that engages the finger in the rotation direction during the rotation operation on the outer peripheral surface or the surface.

  The knob portion may be cylindrical. In this case, the engaging portion can be a protrusion protruding from the outer peripheral surface or the surface. The protrusion may be a protrusion that protrudes from the surface and is formed along a string connecting two points on the outer periphery of the surface. The protruding portion may be formed between two points on the outer periphery of the surface along the diameter of the surface of the knob portion.

  The knob portion may be formed in a prismatic shape. In this case, the engaging portion is formed of a prismatic side surface located on the outer periphery of the knob portion.

  Further, the knob portion may have a cylindrical shape in which a part on the outer periphery is a flat surface. In this case, the engaging portion is a flat surface.

  Further, the knob portion may have an elliptic cylinder shape. In this case, the engaging portion has an elliptical columnar outer peripheral surface.

  A water sampler equipped with such an air hole plug has a hollow main body part, an air hole communicating with the inside and outside of the main body part, and a male screw part of the air hole plug provided on the inner periphery of the air hole. And a sealing member for water stop arranged between the main body portion and the knob portion of the air hole plug around the air hole.

  The main body of the water sampler may have a screw mark around the air hole plug. In this case, in the air hole plug, the male screw part is screwed into the female screw part on the air hole side with an appropriate torque by positioning the engaging part with respect to the mark.

[Structure of sampler]
FIG. 1 is a perspective view showing a water sampler having an air hole plug.

  As shown in FIG. 1, the water sampling device 1 of the present embodiment includes a water sampling container 3, an open maintaining mechanism 5, an air hole plug 7, and a drain valve 9.

  The water sampling container 3 is a main body part of the water sampling device 1 and is formed in a hollow cylindrical shape by resin. Both ends of the water sampling container 3 in the cylindrical axial direction are opened, and resin lids 11 and 13 are attached to be openable and closable, respectively. The water sampling container 3 is submerged in water such as in the sea with the opening opened, and water is collected by closing the opening with the lids 11 and 13 with water inside.

  The closing operation by the lids 11 and 13 is performed by maintaining the open state of the lids 11 and 13 by the open maintaining mechanism 5 and releasing the maintenance.

  That is, the lids 11 and 13 are coupled by a biasing member (not shown) such as a coil spring or a rubber rope that passes through the water sampling container 3, and the opening of the water sampling container 3 is opened by the biasing force of the biasing member. The closed state is maintained while closing.

  The open maintaining mechanism 5 keeps the lids 11 and 13 open against the biasing force of the biasing member, and is attached to the outer peripheral surface of the water sampling container 3 along the axial direction. . The open maintaining mechanism 5 includes upper and lower mount blocks 15 and 17, a push rod 19, and an intermediate block 21 made of resin.

  The upper and lower mount blocks 15 and 17 are fixed to the outer peripheral surface of the water sampling container 3. A push rod 19 is supported so as to be movable in the axial direction with respect to the upper and lower mount blocks 15 and 17.

  That is, the push rod 19 is inserted into the upper mount block 15 and supported by the lower mount block 17 by a biasing member 23 such as a coil spring, and a trigger member (not shown) called a messenger collides with the tip. Thus, it moves in the axial direction against the urging force of the urging member 23. An intermediate block 21 is supported on the push rod 19.

  The intermediate block 21 is hooked with wires (not shown) extending from the tip end portions 11a and 13a of the lid bodies 11 and 13, and the lid bodies 11 and 13 are maintained in the open state. Further, the intermediate block 21 is movable in the axial direction against the urging force of the urging member 23 together with the push rod 19, and the hooking of the wire is released by this movement in the axial direction, and the lid 11 and The maintenance of the 13 open state is released.

  The air hole plug 7 is made of resin and closes the air hole 25 (see FIG. 6) provided at the upper end of the water sampling container 3. The air hole 25 is formed so as to penetrate the inside and outside of the water sampling container 3, and the air hole plug 7 is attached to the air hole 25 by screwing and loosened so that the inside and outside of the water sampling container 3 can be loosened. Communicate. The details of the air hole plug 7 will be described later.

  The drain valve 9 is made of resin, closes a drain port (not shown) provided at the lower end of the water sampling container 3, and protrudes from the outer peripheral surface of the water sampling container 3. The drainage valve 9 allows the inside and outside of the water sampling container 3 to communicate with each other by being pushed into the water sampling container 3, thereby allowing drainage from the water sampling container 3.

  In addition, drainage is performed in a state where the water sampling device 1 is lifted from the water, but the inside and outside of the water sampling container 3 are communicated in advance by the air hole plug 7 and the inside of the water sampling container 3 is opened to the atmosphere. deep. Thereby, in the water sampling device 1, drainage can be performed smoothly.

[Air hole plug]
2 is a perspective view showing the periphery of the air hole plug of FIG. 1, and FIGS. 3 to 7 are a perspective view, a front view, a side view, a plan view, and a rear view of the air hole plug of FIG.

  The air hole plug 7 includes a male screw portion 27 and a knob portion 29.

  The male screw portion 27 is a portion for screwing into the air hole 25 and screwed into the female screw portion 25a on the air hole 25 side. In the present embodiment, the female screw portion 25a on the air hole 25 side is formed by cutting a female screw on the inner periphery of the air hole 25, but is fixed to the inner peripheral surface or the outer peripheral surface of the water sampling container 3, and the female screw is fixed. It is also possible to form it with a nut-like member that continues to the air holes that are not cut.

  The male threaded portion 27 is a cylinder having a male threaded outer peripheral surface. A communication hole 31 that communicates the inside and outside of the water sampling container 3 is provided in the axial center portion of the male screw portion 27. The communication hole 31 is formed from the distal end to the proximal end along the axial direction of the male screw portion 27.

  The base end of the male screw portion 27 is continuous with the large diameter portion 33 where the male screw is not cut. The large diameter portion 33 is larger in diameter than the male screw portion 27 and smaller in diameter than the knob portion 29, and connects between the male screw portion 27 and the knob portion 29. A communication hole 31 is opened on the outer peripheral surface of the large diameter portion 33. The large-diameter portion 33 has a slightly curved outer peripheral surface in order to fit a seal member 35 described later on the outer periphery.

  The knob portion 29 has a columnar shape that is integral with the male screw portion 27, and is rotated around the axis by an operator's finger when the male screw portion 27 is screwed into and released from the female screw portion 25a. . In addition, the time of screwing operation means the time of performing the operation of screwing into the female screw portion 25a of the male screw portion 27, and the time of screwing releasing operation means the time of performing the opposite operation.

  The knob portion 29 of the present embodiment is integrally continuous with the male screw portion 27 via the large diameter portion 33. The back surface 29 a of the knob portion 29 adjacent to the large diameter portion 33 is formed in a tapered shape that increases in diameter as the distance from the large diameter portion 33 increases.

  Between the knob part 29 and the water sampling container 3, a sealing member 35 made of a water stop O-ring or the like is disposed. The seal member 35 is formed in an annular shape having a circular cross section that fits to the outer periphery of the large diameter portion 33. The seal member 35 is fastened between the knob portion 29 and the water sampling container 3 to close the opening 31 a of the communication hole 31 of the large diameter portion 33.

  Therefore, when the air hole plug 7 of this embodiment is loosened with respect to the air hole 25 and the opening 31 a of the large diameter portion 33 of the communication hole 31 is opened, the water collection container 3 is connected via the communication hole 31. It is designed to communicate inside and outside. Thus, in this embodiment, the air hole 25 is opened by the communication hole 31.

  The air hole plug 7 can be released by removing the communication hole 31 and removing the air hole 25. In this case, the large diameter portion 33 can also be omitted.

  The knob portion 29 of the present embodiment is provided with an engaging portion 37 for engaging the finger in the rotation direction when the operator performs a rotation operation.

  The engaging portion 37 of the present embodiment is a protruding portion that protrudes from the surface 29b of the knob portion 29, particularly a protruding portion that is formed along a string connecting two points on the outer periphery of the surface 29b. Here, the surface 29 b of the knob portion 29 refers to a surface in the axial direction located on the side opposite to the water collection container 3. A surface in the axial direction located on the water sampling container 3 side of the knob portion 29 is a back surface 29a. For example, as shown in FIG. 8, the engaging portion 37 may be a protruding portion that protrudes from the outer peripheral surface 29 c instead of the surface 29 b of the knob portion 29.

  As long as the engaging part 37 which is a protrusion part is formed along the string, it does not need to extend between two points on the outer periphery, and can also be formed partially between two points on the outer periphery. . In the present embodiment, the engaging portion 37 is formed between two points on the outer periphery of the surface 29 b along the diameter of the surface 29 b of the knob portion 29.

  The engaging portion 37 has a rectangular plate shape that is long in the extending direction, and has engaging surfaces 37a on both sides in the intersecting direction (rotating direction of the knob portion 29) with respect to the extending direction. The engaging portion 37 can be held (engaged) so that the operator's thumb and index finger are brought into contact with these engaging surfaces 37a, and the knob portion 29 can be easily rotated.

  In particular, since the air hole plug 7 is loosened when the water sampler 1 is lifted from the water and drained as described above, the knob 29 is usually slippery and difficult to rotate. However, in this embodiment, since the operator can rotate the engaging portion 37 with the finger engaged, the knob portion 29 can be easily and reliably rotated even when wet with water.

  Further, when the air hole plug 7 is tightened, the engagement portion 37 can be used as a guide for torque management. For example, the knob portion 29 of the air hole plug 7 is abutted against the outer peripheral surface of the water sampling container 3 via the seal member 35, and the direction of the engaging portion 37 can be displaced from 90 to 90 degrees or 180 degrees from that state. In this case, the air hole plug 7 can be tightened with an appropriate torque.

[Effect of Example 1]
The air hole plug 7 of the present embodiment has a male screw part 27 for screwing that is screwed into the female screw part 25a on the air hole 25 side, and a columnar shape integral with the male screw part 27, and during screwing operation and screw releasing operation. The knob part 29 is provided with an engaging part 37 for engaging the operator's finger in the rotation direction with the surface 29b at the time of the rotation operation.

  Therefore, since the air hole plug 7 of the present embodiment can engage the operator's finger in the rotation direction with the engaging portion 37 of the surface 29b of the knob portion 29, the knob portion 29 is wet with water. However, the operator's fingers are less likely to slip when loosened, and the work can be performed easily and reliably.

  In addition, the air hole plug 7 of the present embodiment is a guideline for torque when the engaging portion 37 is tightened, and can be tightened with an appropriate torque, and variations in tightening torque by the operator can be suppressed.

  In the present embodiment, the knob portion 29 has a columnar shape, and the engaging portion 37 is formed of a protruding portion protruding from the surface 29b. Therefore, the finger can be hooked on the engaging portion 37 as the protruding portion, thereby making it easier and more reliable. The work of loosening the air hole plug 7 can be performed.

  In addition, the engaging portion 37 that is a protrusion is a protruding portion formed along a string connecting two points on the outer periphery of the surface 29b of the knob portion 29, so that the operator hits the thumb and index finger. Therefore, the air hole plug 7 can be loosened more easily and reliably.

  In particular, the engaging portion 37 as the protruding portion is formed between two points on the outer periphery of the surface 29b along the diameter of the surface 29b of the knob portion 29, so that the operator can hit his thumb and index finger. Thus, the rotation operation of the knob portion 29 in the pinched state can be smoothly performed.

  The water sampler 1 having the air hole plug 7 allows the air hole plug 7 to be smoothly loosened and drained from the inside even immediately after the water is sampled and drawn from the water.

  FIG. 9 is a front view of the air hole plug according to the second embodiment, and FIG. 10 is a plan view thereof. In the second embodiment, components corresponding to those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the air hole plug 7 of this embodiment, the engaging portion 37 is provided on the outer peripheral surface 29 c of the knob portion 29. Specifically, the knob portion 29 is formed in a prismatic shape, and the engaging portion 37 includes a prismatic side surface 29 d located on the outer periphery of the knob portion 29.

  In the present embodiment, the knob portion 29 is formed in a pentagonal prism shape. Thereby, the directivity of the knob part 29 is easy to visually recognize, and torque management at the time of tightening is easy to perform. The knob portion 29 may be a triangular prism. Also in this case, the directivity is easy to visually recognize, and the same effects as the pentagonal prism can be achieved. However, the knob portion 29 may be a quadrangular column, a hexagonal column, or the like.

  In addition, also in the present embodiment, the same effects as those of the first embodiment can be obtained.

  FIG. 11 is a front view of the air hole plug according to the third embodiment, and FIG. 12 is a plan view thereof. In the third embodiment, components corresponding to those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the air hole plug 7 of the present embodiment, the engaging portion 37 is provided on the outer peripheral surface 29 c of the knob portion 29 as in the second embodiment. However, in this embodiment, the knob portion 29 is formed in a cylindrical shape with a part on the outer periphery being a flat surface 29e, and the engaging portion 37 is formed of a flat surface 29e.

  Although only one flat surface 29e is provided in FIGS. 11 and 12, for example, a pair of flat surfaces 29e opposed in the radial direction as shown in FIG. 13 may be provided.

  In the third embodiment, the same effects as those of the first embodiment can be obtained.

  FIG. 14 is a front view of the air hole plug according to the fourth embodiment, and FIG. 15 is a plan view thereof. In the fourth embodiment, components corresponding to those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the air hole plug 7 of the present embodiment, the engaging portion 37 is provided on the outer peripheral surface 29 c of the knob portion 29 as in the second embodiment. In the present embodiment, the knob portion 29 is formed in an elliptical columnar shape, and the engaging portion 37 is composed of an outer peripheral surface 29c having an elliptical columnar shape.

  In the fourth embodiment, the same function and effect as in the first embodiment can be achieved.

  FIG. 16 is a front view of the air hole plug according to the fifth embodiment, and FIG. 17 is a plan view thereof. In the fifth embodiment, the same reference numerals are given to the components corresponding to those in the first embodiment, and a duplicate description will be omitted.

  In the air hole plug 7 of the present embodiment, the engaging portion 37 is provided on the outer peripheral surface 29 c or the surface 29 b of the knob portion 29.

  Specifically, the knob portion 29 is formed in a cylindrical shape and includes a concave portion 29f that extends radially inward from the outer peripheral surface 29c. The recess 29f is provided from the front surface 29b to the back surface 29a of the knob portion 29 in the axial direction. The recess 29f is preferably formed in a range where the seal member 35 is not exposed.

  In the fifth embodiment, the same effects as those in the first embodiment can be achieved.

  FIG. 18 is a front view of a principal part of a water sampler according to a sixth embodiment. In the fifth embodiment, the same reference numerals are given to the components corresponding to those in the first embodiment, and a duplicate description will be omitted.

  In the water sampling device 1 of the present embodiment, the water sampling container 3 has a mark 39 for screwing around the air hole plug 7. The other configuration is the same as that of the first embodiment including the air hole plug 7.

  In such a water sampler 1, when the air hole plug 7 is tightened, the engagement portion 37 is positioned with respect to the mark 39, so that the male screw portion 27 of the air hole plug 7 is fitted with the female screw on the air hole 25 side with an appropriate torque. The air hole plug 7 can be tightened by screwing into the portion 25a.

  For example, the knob portion 29 of the air hole plug 7 is abutted against the outer peripheral surface of the water sampling container 3 through the seal member 35, and the engagement portion 37 is aligned with the mark 39 from that state. 7 can be tightened with an appropriate torque.

  The positioning of the mark 39 and the engaging portion 37 is not limited to the above, and can be set freely.

  For example, in the case of the air hole plug 7 of the second embodiment, the corners of the polygonal shape are aligned with the mark 39. In the case of the air hole plug 7 of the third embodiment, the mark 39 can be visually recognized at a portion having the flat surface 29e, the mark 39 cannot be visually recognized at a portion without the flat surface 29e, and positioning is performed depending on whether the mark 39 is visible. May be performed. In the case of the fourth embodiment, any of the positioning methods of the first and third embodiments may be used. In the case of the fifth embodiment, the same positioning method as that of the third embodiment may be employed.

  In the sixth embodiment, the air hole plug 7 can be tightened with an appropriate torque more easily and reliably.

  In addition, the same effects as those of the first embodiment can be achieved.

1 Water Sampler 3 Water Sample Container (Main Body)
7 Air hole plug 25 Air hole 25a Female thread part 27 Male thread part 29 Knob part 29b Surface 29c Outer peripheral surface 35 Sealing member 37 Engaging part 29d Side surface 29e Flat surface 39 Mark

In the present invention, the operator's finger is difficult to slip when loosened, and in order to suppress variation in tightening torque by the operator when tightening, the inside and outside of the hollow water sampler are communicated with each other from the inside of the water sampler. A resin air hole plug of a water sampling device for closing an air hole that is opened during drainage by screwing, a male thread part that is screwed into the air hole, and a screwing operation and a screwing releasing operation and a knob portion that is at the rotational operation, the handle portion may have a engaging portion for engaging in the rotational direction of the finger during the rotation operation to the outer peripheral surface or surfaces, wherein the handle portion from the rear surface of the tapered Continuing from the male threaded portion through a large diameter portion , the large diameter portion is larger in diameter than the male threaded portion and abuts against the surface of the water sampler, and an opening for a communication hole is formed in the large diameter portion. The communication hole is formed by opening the tip of the male screw portion and the large diameter portion. It is formed over the bets, with a seal member for closing the opening of said large diameter portion being fastened between the fitting arranged tapered rear surface and the water bottle of the handle portion to the large diameter portion This is the main feature.

  And the air hole plug of this invention can suppress the dispersion | variation in the fastening torque by an operator.

Claims (9)

An air hole plug of a water sampler that connects the inside and outside of a hollow water sampler and closes an air hole that is opened when draining from the inside of the water sampler by screwing,
A male screw portion for screwing;
A columnar portion integrated with the male screw portion, and a knob portion that is rotated at the time of the screwing operation and screwing operation of the male screw portion;
The knob part has an engaging part that engages a finger in the rotation direction during the rotation operation on the outer peripheral surface or surface.
An air hole plug characterized by that. The air hole plug according to claim 1,
The knob part is cylindrical.
The engaging portion includes a protrusion protruding from the outer peripheral surface or the surface.
An air hole plug characterized by that. The air hole plug according to claim 2,
The protrusion is a protrusion formed along a string that protrudes from the surface and connects two points on the outer periphery of the surface.
An air hole plug characterized by that. The air hole plug according to claim 3,
The protrusion is formed between two points on the outer periphery of the surface along the diameter of the surface of the knob portion.
An air hole plug characterized by that. The air hole plug according to claim 1,
The knob portion is formed in a prismatic shape,
The engaging portion includes the prismatic side surface located on the outer periphery of the knob portion.
An air hole plug characterized by that. The air hole plug according to claim 1,
The knob part has a cylindrical shape in which a part on the outer periphery is a flat surface,
The engaging portion is composed of the flat surface.
An air hole plug characterized by that. The air hole plug according to claim 1,
The knob portion has an elliptical columnar shape,
The engaging portion is the elliptical columnar outer peripheral surface,
An air hole plug characterized by that. A water sampler comprising the air hole plug according to any one of claims 1 to 7,
A hollow body,
The air hole communicating between the inside and the outside of the main body,
A female screw portion provided on the inner periphery of the air hole and screwed with the male screw portion of the air hole plug;
A sealing member for water stop arranged between the main body portion and the knob portion of the air hole plug around the air hole;
A water sampler characterized by comprising: A water sampler according to claim 8,
The main body has a mark for screwing around the air hole plug,
The air hole plug is screwed into the female screw part on the air hole side with an appropriate torque by positioning the engaging part with respect to the mark.
A water sampler characterized by that.

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